CN102598932B - Working vehicle - Google Patents

Abstract

A ride-on rice-planting machine having an engine (5), a steering wheel body (15) provided behind the engine (5), and an operation panel body (10) for covering over the engine (5), wherein the presence of the operation panel body (10) over the engine (5) does not hinder maintenance of the upper part etc. of the engine (5). An upper shaft (41) of the steering wheel body (15) is constructed so that it can vertically pivot about a laterally placed tilt shaft (46) in a manner approaching and moving away from the operation panel body (10). The operation panel body (10) is constructed so that it can vertically pivot about a tubular shaft section (65) as a lateral support shaft installed in parallel with the tilt shaft (46) of a pivotable frame (61), and when the operation panel body (10) is pivoted, it is opened and closed in a manner approaching and moving away from the steering wheel body (15). The upper shaft (41) and the operation panel body (10) can pivot independently from each other.

Description

Rice transplanter

The application is international filing date is on May 22nd, 2007, in the divisional application that on August 11st, 2008 enters National Phase in China, application number is the application for a patent for invention " working truck " of 200780005090.1.

Technical field

The present invention relates to the working truck that the special operation vehicles such as the agricultural machinery of rice transplanter, tractor etc., wheel loader are such.

Background technology

Before, as the transplanting rice seedlings machine of one of working truck example, what have the engine that is mounted in travel machine body front portion and be configured in this engine rear turns to body.In order to make engine and turn to (especially engine) maintenance activity of the steering column of body easy, several alienable closure assemblies of adopting are covered with more.

Patent document 1 discloses an example of transplanting rice seedlings machine, in this rice transplanter, closure assembly is divided into operation plate body, the anterior cover body of covering engine front portion and rear portion cover body three parts of covering engine rear portion and steering column above covering engine.

In the transplanting rice seedlings machine that patent document 1 is recorded, above-mentioned anterior cover body and rear portion cover body, be releasably arranged in travel machine body, and operation plate body is fixed on steering column.When carrying out the maintenance activity of engine, cover body before and after these be unloaded, the surrounding of engine (all around) is exposed.

Patent document 1: Japanese Unexamined Patent Publication 10-210816 publication

Summary of the invention

But, in above-mentioned structure before, because operation plate body is bolted on steering column with some, the top of engine is operated plate body and is covered with, so, when wanting the top of service engine or being positioned at device class (such as, air cleaner etc.) at this position, the existence of operation plate body becomes obstacle during maintenance.In addition, even if operation plate body is unloaded, some bolts be turned on also pretty troublesome.That is, in the structure of above-mentioned patent document 1, the maintenance activity of the top of engine, the device class at this position is very inconvenient or difficult.

In addition, on operation plate body, be provided with the display board of display about the various information of transplanting rice seedlings machine more.At this moment, in the rear side (top of engine) of operation plate body, display panel used control cabinet is configured.

But, in above-mentioned structure before, control cabinet between the operation plate body be fixed by bolts on steering column and engine, so, manufacture transplanting rice seedlings machine time, the operation connecting wirning harness on control cabinet is more difficult, there is the problem of workability difference.

For this reason, technical task of the present invention is to provide the working truck that can solve above-mentioned whole issue.

In order to solve above-mentioned problem, the working truck that technical scheme 1 is recorded, have be mounted in travel machine body front portion power source, be configured in turning to body, covering operation plate body at least partially above above-mentioned power source of this power source rear; Above-mentionedly turn to body, centered by the sloping shaft of transverse direction, can connect with aforesaid operations plate body and liftoffly to rotate up and down; Aforesaid operations plate body, by with the horizontal fulcrum of above-mentioned sloping shaft coaxial or parallel shape centered by, body can be turned to connect liftoff upper and lower opening and closing rotate with above-mentioned; Above-mentionedly turn to body and aforesaid operations plate body, can separately rotate.

The invention of technical scheme 2, in the working truck that technical scheme 1 is recorded, it is characterized in that, be positioned at the rearward end of the upper shelf above above-mentioned power source, by above-mentioned horizontal fulcrum, the rotatable earth's axis be bearing in above-mentioned travel machine body, erect on the support unit at above-mentioned power source rear; The leading section of above-mentioned upper shelf, is releasably connected with above-mentioned travel machine body; Aforesaid operations plate body is arranged in above-mentioned upper shelf.

The invention of technical scheme 3, in the working truck that technical scheme 2 is recorded, it is characterized in that, operate the action bars mechanism of above-mentioned travel machine body action, stretch out from facing outward of aforesaid operations plate body, the base end part of this action bars mechanism, is arranged in above-mentioned upper shelf and also can rotates integratedly with above-mentioned upper shelf.

The invention of technical scheme 4, in the working truck that technical scheme 2 or 3 is recorded, is characterized in that, in the front portion of above-mentioned travel machine body, be releasably installed with the anterior cover body and rear portion cover body that surround above-mentioned power source and aforesaid operations plate body from front and back respectively; The leading section of above-mentioned upper shelf, releasably with in above-mentioned travel machine body, erect and be connected at the auxiliary frame in above-mentioned power source front, under the state having unloaded above-mentioned front portion cover, the leading section of above-mentioned upper shelf is exposed to the front of operation plate body.

Invention effect

In the structure described in technical scheme 1, what be configured in power source rear turns to body, centered by the sloping shaft of transverse direction, can connect liftoffly to rotate up and down with the operation plate body at least partially covered above power source; Aforesaid operations plate body, by with the horizontal fulcrum of above-mentioned sloping shaft coaxial or parallel shape centered by, body can be turned to connect liftoff upper and lower opening and closing rotate with above-mentioned; Above-mentioned body and the aforesaid operations plate body of turning to can separately rotate.

According to this structure, make the above-mentioned body that turns to downwards after above-mentioned sloping shaft reverses, as long as by aforesaid operations plate body around the open rotation upward of above-mentioned horizontal fulcrum, this operation plate body just can leave above above-mentioned power source, between on aforesaid operations plate body and above-mentioned power source, open the enough large space that hand can put in.

Therefore, on the top to above-mentioned power source, the device class (such as air cleaner etc.) that is positioned at this position is when keeping in repair, and the existence of aforesaid operations plate body does not become the obstacle of maintenance.In addition, when keeping in repair, also aforesaid operations plate body need not to be unloaded as before, eliminating the trouble that this unloads operation.Therefore, to the top of above-mentioned power source, be positioned at this position the maintenance activity of device class easy.

In addition, between on aforesaid operations plate body and above-mentioned power source, open the enough large space that hand can put in, so, such as when control cabinet is configured in rear side (top of above-mentioned power source) of aforesaid operations plate body, easily can carry out the operation connecting wirning harness toward above-mentioned control cabinet, improve the assembleability of working truck.

Technical scheme 2 record structure in, be positioned at the rearward end of the upper shelf above above-mentioned power source, via the rotatable earth's axis of above-mentioned horizontal fulcrum be supported in above-mentioned travel machine body, erect on the support unit at position, above-mentioned power source rear; The leading section of above-mentioned upper shelf, is releasably connected with above-mentioned travel machine body; Aforesaid operations plate body is arranged in above-mentioned upper shelf.

According to this structure, due to the center of rotation of above-mentioned upper shelf, i.e. above-mentioned horizontal fulcrum, be positioned at the rear end side of above-mentioned upper shelf, namely near the above-mentioned side turning to body, so, by above-mentioned upper shelf and aforesaid operations plate body around above-mentioned horizontal axially open rotate time, be formed in aforesaid operations plate body and above-mentioned power source above between space forwards open.

Therefore, operator can from the front side of travel machine body, keeps in repair the top of above-mentioned power source, the device class that is positioned at this position.Therefore, when keeping in repair, above-mentionedly turning to the existence of body not become obstacle, can operating efficiency be improved.

In the structure that technical scheme 3 is recorded, operate the action bars mechanism of above-mentioned travel machine body action, stretch out from facing outward of aforesaid operations plate body, the base end part of this action bars mechanism, be arranged in above-mentioned upper shelf, can rotate integratedly with above-mentioned upper shelf.So, rotate interlock with the opening and closing up and down of above-mentioned upper shelf and aforesaid operations plate body, aforesaid operations linkage also with above-mentioned horizontal fulcrum for center of rotation is rotated linkedly.

Therefore, when making above-mentioned upper shelf and the upper and lower opening and closing of aforesaid operations plate body is rotated, will not unload by aforesaid operations linkage, its existence also has no relations.Therefore, the rotating operation of opening and closing up and down of above-mentioned upper shelf and aforesaid operations plate body is easy, in this regard, also can improve the top to above-mentioned power source, be positioned at the efficiency that the device class at this position carries out maintenance activity.

In the structure that technical scheme 4 is recorded, in the front portion of above-mentioned travel machine body, the anterior cover body and rear portion cover body that surround above-mentioned power source and aforesaid operations plate from front and back are releasably installed respectively; The leading section of above-mentioned upper shelf, releasably with in above-mentioned travel machine body, erect and be connected at the auxiliary frame in above-mentioned power source front, in the state unloading above-mentioned anterior cover body, the leading section of above-mentioned upper shelf exposes from the front of aforesaid operations plate body.So operator pinches the leading section of above-mentioned upper shelf, carries out the rotating operation of opening and closing up and down of above-mentioned upper shelf and aforesaid operations plate body.That is, the leading section of above-mentioned upper shelf, also has the function of the handle as upper and lower opening and closing rotating operation concurrently.So, even without special grip member, also easily can carry out the rotating operation of opening and closing up and down of above-mentioned upper shelf and aforesaid operations plate body, can component number be reduced.

Accompanying drawing explanation

Fig. 1 is the end view of the transplanting rice seedlings machine as working truck.

Fig. 2 is the vertical view of ride-type rice seedling machine.

Fig. 3 is the vertical view of travel machine body front portion.

Fig. 4 is vertical view under the state eliminating cover body, travel machine body front portion.

Fig. 5 is decomposition side view under state upper shelf upwards being opened rotation, travel machine body front portion.

Fig. 6 from oblique rear, the stereogram turning to body.

Fig. 7 is stereogram that see obliquely from the front, that turn to body and upper shelf.

Fig. 8 from viewed from oblique rear, the stereogram of upper shelf.

Fig. 9 is the end view of travel machine body front portion.

Figure 10 is end view under state upper shelf upwards being opened rotation, travel machine body front portion.

Figure 11 is the exploded perspective view of operation plate body, engine cover body and steering column cover body.

Figure 12 is the right side view of travel machine body front portion.

Figure 13 is the right side view of gear shift pedal and brake pedal.

Figure 14 is that see obliquely from the front, gear shift pedal and brake pedal stereogram.

Figure 15 is the Action Specification figure of speed of a motor vehicle adjusting rod.

Figure 16 is the Action Specification figure of gear shift pedal.

Figure 17 is the Action Specification figure of brake pedal.

Embodiment

Below, with reference to accompanying drawing (Fig. 1 ~ Figure 17), embodiments of the present invention are described.Fig. 1 is the end view of the transplanting rice seedlings machine as working truck, Fig. 2 is the vertical view of ride-type rice seedling machine, Fig. 3 is the vertical view of travel machine body front portion, Fig. 4 is under the state eliminating cover body, the vertical view of travel machine body front portion, Fig. 5 is under state upper shelf upwards being opened rotation, the decomposition side view of travel machine body front portion, Fig. 6 is from oblique rear, turn to the stereogram of body, Fig. 7 sees obliquely from the front, turn to the stereogram of body and upper shelf, Fig. 8 is from viewed from oblique rear, the stereogram of upper shelf, Fig. 9 is the left side view of travel machine body front portion, Figure 10 is under state upper shelf upwards being opened rotation, the end view of travel machine body front portion, Figure 11 is operation plate body, engine cover body, with the exploded perspective view of steering column cover body, Figure 12 is the right side view of travel machine body front portion, Figure 13 is the right side view of gear shift pedal and brake pedal, Figure 14 sees obliquely from the front, the stereogram of gear shift pedal and brake pedal, Figure 15 is the Action Specification figure of speed of a motor vehicle adjusting rod, Figure 16 is the Action Specification figure of gear shift pedal, Figure 17 is the Action Specification figure of brake pedal,

(1) summary of rice transplanter

First, main with reference to the summary of Fig. 1 ~ Fig. 4 explanation as the transplanting rice seedlings machine of working truck.

As shown in Figure 1 to 4, the travel machine body 1 of the transplanting rice seedlings machine in embodiment, has body frame 2, and this body frame 2 is carry by the left and right front-wheel 3 be configured in before and after its left and right sides and left and right trailing wheel 4.

The engine 5 as power source is carried in the front portion of travel machine body 1.On engine 5, configure air cleaner 31 (with reference to Fig. 5).In the rear lower portion of engine 5, configure the gearbox 6 with Hyaulic infinite variable speed machine 170 (see Fig. 5 and Figure 12 ~ Figure 14) etc.Gearbox 6, after the power from engine 5 suitably speed change, is delivered to front and back four-wheel 3,4 by the gear shift of scheming not show.

Front truck axle housing 7 from the left and right sides of gearbox 6 to the left and right foreign side give prominence to, front-wheel 3 is arranged on the both ends of this front truck axle housing 7 steerably.On the tubular frame 8 rearward stretched out from gearbox 6, be fixed wtih rear car axle housing 9, in the left and right sides of rear car axle housing 9, trailing wheel 4 be installed.

Being covered with by some cover bodies above of body frame 2, each cover body can load and unload respectively.Such as, the periphery of engine 5, is surrounded from top and front and back by as the operation plate body 10 of front engine cover, engine cover body 11 and steering column cover body 12, can load and unload (see Fig. 5) respectively.Engine cover body is equivalent to the anterior cover body recorded in technical scheme, and steering column cover body is equivalent to the rear portion cover body recorded in technical scheme.

In addition, the lower end periphery of in the front portion above of body frame 2, engine cover body 11 and steering column cover body 12, is overlooked and is seen that the forebody cover body 13 roughly in ロ font is covered with.The rear portion above of body frame 2, is covered with by rear body cover body 14, this rear body cover body 14, is formed as the rear end continuous print form with forebody cover body 13.

On gearbox 6, the tilting erected for steering operation travel machine body 1 turns to body 15.Turn to the front end of body 15 (upper end) side the past hood to protrude upward, in its front end, tumbler disc 43 is installed.

On rear body cover body 14, turn to the position at body 15 rear, driver's seat 17 is set by Carrier for cycle 16.When being sitting in the operator's rotating operation tumbler disc 43 on driver's seat 17, with its operational ton (amount of spin) correspondingly, the rudder angle (steering angle) of left and right two front-wheel 3 changes.

For the brake pedal 19 of the gear shift pedal 18 and brake operating travel machine body 1 that suitably regulate the speed of a motor vehicle of travel machine body 1, stretch out upward (see Fig. 2 and Fig. 3) from (gap) between the end edge and the front-end edge of rear body cover body 14 of forebody cover body 13.Gear shift pedal 18 in embodiment and brake pedal 19, in the left and right sides of travel machine body 1 turning to body 15, on the right side of the direct of travel being configured in travel machine body 1.In addition, the left and right sides of mmi machine body cover body 13, is provided with the preliminary seedling mounting table 20 for loading several preliminary seedling pads.

In the side, left and right of operation plate body 10, across the main shift bar 21 turning to body 15 ground to configure the advance of alter operation travel machine body 1, stopping, retrogressing and the speed of a motor vehicle thereof.At the opposite side of operation plate body 10, configuring the accelerator rod 22 of the rotating speed for regulating engine 5, the shift bar 24 (see Fig. 3 and Fig. 4) of the speed of a motor vehicle adjusting rod 23 of speed of a motor vehicle adjustment operation and the such two kinds of operations of automatic running operation, the descending operation carrying out seedling-transplanting device 25 described later and the operation of power teasel root etc. can be carried out.These bars 21 ~ 24 are all equivalent to the action bars mechanism recorded in technical scheme.

Article 6, the seedling-transplanting device 25 of rice transplanting, by the parallel linkage 26 be made up of upper and lower strut, liftable is adjustably connected to the rearward end of body frame 2.The structure of seedling-transplanting device 25 is known before.That is, seedling-transplanting device 25 have 3 groups of transmission cases 27 of the transmission of power accepting gearbox 6, the rotary rice transplanting mechanism 28 being arranged on these transmission case 27 left and right sides, the nearly travel machine body of above termination 1 forward lean be arranged on seedling carrying base 29 above transmission case 27, be configured in smooth field hull 30 below transmission case 27.

(2) structure of body is turned to

Below, the structure turning to body is described with reference to Fig. 5 ~ Figure 10.

Turn to body 15 to have: the steering wheel lower shaft 40 upwards projected on gearbox 6, be connected to steering wheel lower shaft 40 upper end by Hooks coupling universal coupling 42 steering wheel on axle 41 and install the tumbler disc 43 of axle 41 upper end on the steering wheel.

The periphery of steering wheel lower shaft 40, be fixed on outside gearbox 6, turn to column casing 44 to surround as the bottom of support unit, this steering wheel lower shaft 40, can only rotate the earth's axis and be bearing in bottom and turn on column casing 44.

Axle 41 on steering wheel, turns to together with column casing 45 with the top fitted in its periphery, centered by the left and right lateral inclination axle 46 in Hooks coupling universal coupling 42, can rotate (tilt rotation) (see Fig. 5 and Figure 10) towards above-below direction is bending.

On steering wheel, axle 41 can only rotate the earth's axis and is bearing in top and turns on column casing 45.Turn to the bottom of column casing 45 on top, be provided with posture governor motion 47, this posture governor motion 47 is adjusted to some levels (with reference to Fig. 6) for this top being turned to the angle of bend of axle 41 on column casing 45 and steering wheel (angle of inclination).

Posture governor motion 47, has tilt rotation bar 48 and the locking plate 49 of rotary type.Tilt rotation bar 48 to be arranged on analog bracket 53 that section is コ font upward and rearward to extend, and this analog bracket 53 is located at bottom and turns to the upper end of column casing 44 and oblique upper is stretched out forward.Locking plate 49 is located at the side lower that top turns to column casing 45, relative with the length direction middle part of tilt rotation bar 48 from below.

The base end part of tilt rotation bar 48, can be arranged on analog bracket 53 by the pivot fulcrum 50 of transverse direction up and down rotating operation.At the length direction middle part of tilt rotation bar 48, be fixed wtih hook-shaped clamping hooked 51 down.On the other hand, in the upper surface of locking plate 49, along the rotation direction centered by sloping shaft 46, define several locking groove 52 with appropriate intervals.

When making top turn to angle of bend (angle of inclination) of the bending rotation regulation of axle 41 on column casing 45 and steering wheel, the clamping hooked 51 of tilt rotation bar 48 optionally engages with any one in several locking groove 52, like this, top turns to the inclination attitude of axle 41 on column casing 45 and steering wheel be graded change adjustment and maintain.

Tilt rotation bar 48, is pushed by the direction that the spring members scheming not show engages towards clamping hooked 51 with the locking groove 52 of locking plate 49 always.The free end (leading section) of tilt rotation bar 48 stretches out from steering column cover body 12 outside (backward).

(3) cover body and supporting construction thereof

Below, main with reference to Fig. 3 ~ Figure 11, the cover body and supporting construction thereof that are positioned at engine periphery are described.

Operation plate body 10 above covering engine 5, see it is roughly elliptoid form from overlooking, be arranged in the upper shelf 60 (being described in detail later) that is positioned at above engine 5, and turn to from top the length direction middle part of column casing 45 to give prominence to towards the front of travel machine body.On operation plate body 10, configure display part 10b, key swich etc.In the rear side of display part 10b, be provided with the control cabinet 117 (see Fig. 9 ~ Figure 11) of the display and control carrying out this display part 10b etc.

Steering column cover body 12, sees it is roughly circular arc from overlooking, and surrounds operation plate body 10 and top turns to column casing 45 from rear.The left and right front-end edge 12a of steering column cover body 12, what be formed as tilting towards oblique front lower place is skewed, and tightly superimposed with the left and right end edge 11a of engine cover body 11.

The lower ora terminalis 12b of steering column cover body 12, is formed as delaying towards oblique back upper place semi-steep skewed, and with front lower cover 13 edge 13a is tightly superimposed above.On this lower ora terminalis 12b, at some positions, be extruded with tongue piece 82 (see Fig. 5 and Figure 11) down integratedly, this each tongue piece 82 from top be fitted to be formed at forebody cover body 13 above edge 13a embedded hole 83 (see Fig. 4) in.

In addition, the upper edge of steering column cover body 12, tightly connects with the rearward end in the lower ora terminalis of operation plate body 10 and end, the left and right sides.The front end hook portion of the pair of right and left helical spring 84 be arranged on the plate 72 of aftermentioned side arm 62, hang over be formed at steering column cover body 12 inner face locking bracket 58 on, like this, can make the upper edge of steering column cover body 12 with operation plate body 10 lower ora terminalis be close to, do not rock by whole steering column cover 12 urged forward (see Fig. 9).

On the operation rear portion of plate body 10 and the top of steering column cover body 12, be formed with breach groove 10a, 12c (see Figure 11) of allowing that top turns to axle about 41 on column casing 45 and steering wheel to rotate.Under the state being installed with operation plate body 10 and steering column cover body 12, both 10a, 12c dock, become the elongated hole of above-below direction, top turns to axle 41 on column casing 45 and steering wheel, along this breach groove 10a, 12c (elongated hole) rotate up and down and with operation plate body 10 connect from.

As shown in Fig. 2, Fig. 3, Figure 11, engine cover body 11 is more thinner towards front end streamlineds (oval shelly), the left and right end edge 11a of engine cover body 11, what be formed as tilting towards oblique back upper place is skewed, and from downside, more past top is more towards the rear of body frame 2.On the end edge 11a of this left and right, being formed with several guiding tongue pieces 79 given prominence to towards the rear (is each 2 up and down in embodiment, see Fig. 5 and Figure 11), when being installed with engine cover body 11, these guiding tongue pieces 79 enter inner face side from the left and right front-end edge 12a of steering column cover body 12.

The lower ora terminalis 11b of engine cover body 11, be formed as towards oblique back upper place light grade tilt skewed, and, with the light grade in forebody cover 13 the edge 13a above that tilts towards oblique back upper place sliding.Forward position in this lower ora terminalis 11a, project locking tongue piece 80 (see Fig. 5 and Figure 11) down integratedly, this engaging tongue piece 80, be fitted to from top in connecting hole 81 (see Fig. 4), described connecting hole 81 is formed in position, front end in forebody cover body 13, edge 13a above.

The upper shelf 60 of support operational plate body 10 from below, is formed by overlooking the rotating turret 61 that is seen as roughly E font and overlooking the side arm 62 being seen as roughly U-shaped.In embodiments, the front end of the left and right two-arm 71 extended backwards in side arm 62, is connected to bolt before the horizon bar 63 in rotating turret 61.The anterior-posterior length size of side arm 62, is set as that the leading section of this side arm 62 forwards stretches out than the front end of operation plate body 10, from the degree of greatly stretching out from operation plate body 10 when overlooking and see.

The side arm 64 mutually extended in parallel in the same direction, stretch out from the position by two ends of the horizon bar 63 rotating turret 61, be provided with tubular axle portion 65 at the external part of this two side arms 64, this tubular axle portion 65 as at left and right directions mutually in concentrically through horizontal fulcrum.

On the other hand, turn to the front upper of column casing 44 in bottom, be fixed wtih carrier frame plate 66 by welding etc., on this carrier frame plate 66, being fixed wtih the wing arm 67 of pair of right and left that foreign side to the left and right stretches out, in the front end of each wing arm 67, left and right directions being installed mutually in propping up propeller boss 68 with the pivot that heart shaped is through.

The tubular axle portion 65 of each side arm 64 in rotating turret 61, inserts the pivot being arranged on the wing arm 67 corresponding with it rotationally and props up shaft hub 68 outside left and right.Like this, rotating turret 61, upper shelf 60 and operation plate body 10, can rotate around tubular axle portion about 65 opening and closing on the same axis extended in parallel with sloping shaft 46.

At this moment, upper shelf 60 and operation plate body 10, turn to axle 41 on column casing 45 and steering wheel with top, can separately rotate.When upper shelf 60 and operation plate body 10 are rotated around tubular axle portion about 65, upper shelf 60 and operation plate body 10 are close to or away from turning to body 15 (top turns to column casing 45, tumbler disc 43).But, when top turns to axle 41 on column casing 45 and steering wheel to be posture (posture during steering operation) that tilt towards oblique back upper place, because top turns to the existence of axle 41 on column casing 45 and steering wheel, the upwards opening operation of upper shelf 60 and operation plate body 10 is restricted.

In embodiments, as the tubular axle portion 65 of center of rotation, be positioned at the rear end side of upper shelf 60, namely near the side turning to body 15, so, when upper shelf 60 and operation plate body 10 are upwards opened rotation, between on operation plate body 10 and engine 5, define open space (see Fig. 5 and Figure 10) forward.

In addition, from the transverse axis 93 that main shift bar 21 bottom is laterally stretched out towards left and right, insert rotationally and be arranged in the tubular axle portion 65 of side's side arm 64.The trunnion axis 114 of adapting rod 113, inserts the tubular axle portion 65 interior (see Fig. 8) being arranged on the opposing party's side arm 64 rotationally.This adapting rod 113 is inscapes for speed change interlinked mechanism 112, and the elevating mechanism of seedling-transplanting device 25 and power teasel root mechanism are connected with shift bar 24 by above-mentioned speed change interlinked mechanism 112 linkedly.

The length direction pars intermedia of the horizon bar 63 in rotating turret 61, is installed with the center arm 69 stretched out in the same direction with left and right sides arm 64.This center arm 69, from top be located at bottom turn to column casing 44 upper end, section is that the analog bracket 53 of コ font is upward chimeric removably.That is, center arm 69 turns to the analog bracket 53 of column casing 44 side to carry from below by bottom.

As shown in figures 4 and 9, be positioned at the linking arm 70 of front in side arm 62, be releasably connected to bolt and nut and be seen as the auxiliary frame 54 of reverse U shape from front, this auxiliary frame 54 erects the front of the engine 5 in body frame 2.Therefore, upper shelf 60 is being closed around tubular axle portion 65 under the state that have rotated, the front-back of engine 5 and above, turned to column casing 44 to surround by auxiliary frame 54, upper shelf 60 and bottom.

The left and right two-arm 71 of side arm 62 is fixed wtih plate 72 respectively, and between this plate 72, be installed with the strut 73 grown crosswise in left and right, the existence of this strut 73 improves the rigidity of side arm 62.Fuse block 74 is configured on strut 73.Certainly, the top of fuse block 74 is operated plate body 10 and is covered with.

Between plate 72 in left and right two-arm 71, also set up the kayser axle 75 grown crosswise in left and right, this kayser axle 75 can rotate around its transversal line.Kayser axle 75, from the both ends that plate 72 stretches out towards left and right foreign side, be fixed wtih hook-shaped claw 76 forward.In the middle of the length direction of kayser axle 75, be provided with locking bar 77, this locking bar 77 stretches out towards the upper direction intersected with kayser axle 75.

When pair of right and left claw 76 rotates before and after kayser axle 75, engage or engagement release with engagement pin 56 (see Fig. 8, Figure 10 and Figure 11).This engagement pin 56, crosses out from the carrier frame plate 55 being located at engine cover body 11 inner face towards left and right.Torsion spring 78 is installed between claw 76 and plate 72, the elastic force of this torsion spring 78, always by claw 76 towards can engage with the engagement pin 56 of engine cover body 11 side, the direction of rotating forward pushes.

When claw 76 engages with the engagement pin 56 of engine cover body 11 side, engine cover body 11 is locked, can not extracts forward.When wanting unloaded engine cover body 11, utilize the rotating operation forward of locking bar 77, claw 76 is rotated backwards around kayser axle 75, like this, just can remove the engaging (locking) of claw 76 and the engagement pin 56 of engine cover body 11 side.

In addition, anterior on operation plate body 10, be provided with the lid 57 that can rotate around the upper and lower opening and closing of rearward end, when manually by this lid 57 rotating opening, locking bar 77 exposes.

(4) structure of action bars mechanism

Below, with reference to Fig. 4 and Fig. 6 ~ Figure 10, the structure of the action bars mechanism of stretching out that faces outward from operation plate body is described.

The base end part of each action bars mechanism in embodiment, is all arranged in upper shelf 60, and can rotate integratedly around tubular axle portion 65 with operating together with plate body 10 with upper shelf 60.

Namely, in action bars mechanism, be positioned at the main shift bar 21 turning to body about 15 one side, have the through shaft hub of fore-and-aft direction 90 at its bottom (base end part), this shaft hub 90 is configured in the box-shaped bracket 91 interior (see Fig. 7 and Fig. 8) of upper and lower opening.The bearing pin 92 that front and back extend runs through propeller boss 90 and the box-shaped bracket 91 of main shift bar 21.Therefore, main shift bar 21 can around bearing pin 92 left-right rotation.

As shown in Figure 8, in a side of box-shaped bracket 91, left and right laterally projects transverse axis 93.Transverse axis 93 inserts rotationally in the tubular axle portion 65 of the side's side arm 64 be arranged on rotating turret 61 outside left and right.Therefore, box-shaped bracket 91 and main shift bar 21 can rotate before and after transverse axis 93.Therefore, in present embodiment, main shift bar 21 can rotate by fore-and-aft direction, also can rotate by left and right directions.The transverse axis 93 of box-shaped bracket 91, by the speed change interlinked mechanism 94 of connecting rod, steel wire etc., be connected linkedly with gear type transmission mechanism (not shown), the transmission of power of the hydrostatic stepless speed changer in gearbox 6 is to this gear type transmission mechanism.

Be fixed on the speed change guide plate 95 of an end of the horizon bar 63 in rotating turret 61, be positioned at the top of box-shaped bracket 91, the through guide groove 96 of main shift bar 21, reach the outside of operation plate body 10, this guide groove 96 is formed on speed change guide plate 95.Therefore, main shift bar 21 can along guide groove 96 rotating operation all around of speed change guide plate 95.Due to the existence of this guide groove 96, the slewing area of main shift bar 21 is restricted.

As shown in Figure 8, for the accelerator rod 22 of 3 bars 22 ~ 24 being arranged in another side, left and right turning to body 15, be fixed on the rotor plate 97 of its bottom (base end part), can be arranged on rotationally before and after horizontal bearing pin 99 on bracket 98 (see Fig. 6 and Fig. 8) upward, this bracket 98 is fixed in the tubular axle portion 65 of another side arm 64 in rotating turret 61.The rotor plate 97 of accelerator rod 22, by the acceleration interlinked mechanism 100 of steel wire etc., is connected linkedly with the speed setting be located on engine 5 control lever (not shown).

In embodiments, along with will speed up front side (rear side) the hypsokinesis operation of bar 22 from front side toward operator, the rotating speed of engine 5 becomes high rotating speed from the slow-speed of revolution.

The other end of horizon bar 63 in rotating turret 61, by the speed change bracket 101 protruded upward from this horizon bar 63, is installed with bar guide plate 102.Accelerator rod 22 runs through acceleration guide groove 103 (see Fig. 7 and Fig. 8), and reach the outside of operation plate body 10, described acceleration guide groove 103 is formed on bar guide plate 102.Therefore, accelerator rod 22 can along acceleration guide groove 103 rotating operation to front-rear direction of bar guide plate 102.Due to this acceleration existence of guide groove 103, the slewing area of accelerator rod 22 is restricted.

Shift bar 24, have roughly longitudinally through shaft hub 108 at its bottom (base end part), this propeller boss 108 is configured in the undertaking bracket 109 that section is コ font.The shaft hub 108 of the through shift bar 24 of roughly longitudinal bearing pin 110 and undertaking bracket 109 (see Fig. 7 and Fig. 8), shift bar 24 can around bearing pin 110 left-right rotation.

Accept bracket 109, by the propeller boss axle 111 (see Fig. 6, Fig. 8, Fig. 9) that stretch out introversive from speed change bracket 101 side in horizon bar 63 towards left and right, by can around this propeller boss axle 111 rotationally pivot prop up.Therefore, shift bar 24, in the same manner as main shift lever 21, can all around rotate.Accept the bracket 109 speed change interlinked mechanism 112 by connecting rod, steel wire etc., be connected linkedly with the elevating mechanism of seedling-transplanting device 25 and power teasel root mechanism (not shown).

Shift bar 24 is in the same manner as accelerator rod 22, and through speed change guide groove 115 (see Fig. 4, Fig. 7 and Fig. 8), reach the outside of operation plate body 10, described speed change guide groove 115 is formed on bar guide plate 102.Therefore, shift bar 24 can along speed change guide groove 115 rotating operation all around of bar guide plate 102.Due to the existence of guide groove 115 of this speed change, the slewing area of shift bar 24 is also restricted.

Speed of a motor vehicle adjusting rod 23 can perform two kinds of operations: a kind of operation is that the speed change of Hyaulic infinite variable speed machine 170 is exported speed change; Another kind of operation is, the speed change of Hyaulic infinite variable speed machine 170 is exported and remains the value corresponding with the pedal position of gear shift pedal 18 (position of entering into).That is, speed of a motor vehicle adjusting rod 23, can perform the speed of a motor vehicle adjustment operation of the travel machine body 1 same with gear shift pedal 18 and make the automatic running of travel machine body 1 constant-speed traveling operate such two kinds to operate.The speed of a motor vehicle adjusting rod 23 of embodiment, from overlooking, is configured in the side (direct of travel of travel machine body 1 on the right side of) identical with gear shift pedal 18 in the left and right sides turning to body 15.

The speed of a motor vehicle adjusting rod 23 of embodiment, the through shaft hub of left and right directions 104 is had at its bottom (base end part), in the bearing pin portion of this shaft hub 104 rotationally fitted in U-shaped fulcrum 105 (see Fig. 6 and Fig. 8), this U-shaped fulcrum 105 is fixed on above another side arm 64 in rotating turret 61.Therefore, speed of a motor vehicle adjusting rod 23, also in the same manner as accelerator rod 22, can rotate before and after the bearing pin portion of U-shaped fulcrum 105.

The position of the shaft hub 104 in speed of a motor vehicle adjusting rod 23, has the position holding member 120 (see Fig. 8) speed of a motor vehicle adjusting rod 23 being remained on any operating position.In embodiments, the root side of the bearing pin in U-shaped fulcrum 105, be fixed wtih friction plate 121 (see Figure 12 and Figure 15 ~ Figure 17), on the other hand, in bearing pin, across shaft hub 104 ground of speed of a motor vehicle adjusting rod 23 and the opposition side (front) of friction plate 121, outer disk spring washer 122 (see Figure 12 and Figure 15 ~ Figure 17).Disk spring washer 122, by the packing ring being fixed on its front, can not be deviate from from bearing pin.The elastic force of disk spring washer 122, the shaft hub 104 of speed of a motor vehicle adjusting rod 23 is crimped (CONTACT WITH FRICTION) abut on friction plate 121, like this, speed of a motor vehicle adjusting rod 23 can remain on from most forward position to any operating position most backward position.

Be located at the L-shaped arm 106 on the shaft hub 104 of speed of a motor vehicle adjusting rod 23 integratedly, by the speed change steel wire 146 as rope part, be connected linkedly with the shift cam 137 of Hyaulic infinite variable speed machine 170, and, also remove cam 155 by brake bar 160 with constant speed to be connected linkedly (see Figure 12 and Figure 13), this constant speed is removed cam 155 and is associated with brake pedal 19.

In embodiments, along with when by speed of a motor vehicle adjusting rod 23, from front side, in front of operator, side (rear side) hypsokinesis operates, L-shaped arm 106 rotates upward around the bearing pin portion of U-shaped fulcrum 105, speed change steel wire 146 and brake bar 160 are mentioned (stretch-draw) (see Figure 15 and Figure 17), more toward hypsokinesis operation, the speed of a motor vehicle of travel machine body 1 is all the more fast.This direction of operating (more hypsokinesis all the more speed), consistent with the direction of operating (more hypsokinesis rotating speed is higher, all the more fast) of accelerator rod 22.Therefore, for operator, the direction of operating of these two bars 22,23 easily can be identified, good operability.In addition, the maloperation to these two bars 22,23 can also be suppressed.About the continuous action relation between steel wire 146, bar 160 and cam 137,155, will describe in detail below.

As shown in Fig. 3, Fig. 4 and Fig. 7, the through constant-speed traveling guide groove 107 of speed of a motor vehicle adjusting rod 23, reach the outside of operation plate body 10, described constant-speed traveling guide groove 107 is formed on bar guide plate 102.Therefore, speed of a motor vehicle adjusting rod 23 also can rotate along the constant-speed traveling guide groove 107 of bar guide plate 102 to front-rear direction.Due to the constant-speed traveling existence of guide groove 107, the slewing area of speed of a motor vehicle adjusting rod 23 is restricted.

From above-mentioned structure, the base end part of each action bars mechanism 21 ~ 24 in embodiment, is all arranged on rotating turret 61, and rotates integratedly with the rotating turret 61 forming upper shelf 60.

Action effect

According to above-mentioned structure, because top turns to axle 41 on column casing 45 and steering wheel, upper shelf 60 and operation plate body 10, can separately rotate up and down, so, engine cover body 11 and steering column cover body 12 are being unloaded, top is made to turn on column casing 45 and steering wheel axle 41 down after sloping shaft 46 rotates with toppling over, if the open rotation upward around tubular axle portion 65 by upper shelf 60 and operation plate body 10, then upper shelf 60 and operation plate body 10 will leave above engine 5, between on upper shelf 60 and operation plate body 10 and engine 5, define enough large spaces that hand can be put in.

Therefore, on the top to engine 5, the device class (such as, air cleaner 31 etc.) that is positioned at this position is when keeping in repair, and the existence of upper shelf 60 and operation plate body 10 has no relations.In addition, when keeping in repair, also operation plate body 10 need not to be unloaded as before, eliminating the trouble that this unloads operation.Therefore, the maintenance activity of the top of engine 5, the device class at this position easily carries out.

In addition, between on upper shelf 60 and operation plate body 10 and engine 5, define enough large spaces that hand can put in, so, the operation control box 117 of the display part 10b rear side in operation plate body 10 being connected to wirning harness is also simple, and the assembling operation of transplanting rice seedlings machine also improves.

In embodiments, as the tubular axle portion 65 of the center of rotation of upper shelf 60, be positioned at the rear end side of upper shelf 60, namely near turning to body 15 side, so, when upper shelf 60 is upwards opened rotation with operation plate body 10, the space opening forward between being formed in above operation plate body 10 and engine 5.

Like this, operator from the front side of travel machine body 1, can keep in repair the device class at engine 5 top, this position.Therefore, when keeping in repair, turning to the existence of body 15 to have no relations, can operating efficiency be improved.

In addition, from the bottom (base end part) of each action bars mechanism 21 ~ 24 of stretching out that faces outward of operation plate body 10, all be arranged on rotating turret 61, and rotate integratedly with the rotating turret 61 forming upper shelf 60, so, rotate linkedly with upper shelf 60 and the opening and closing up and down that operates plate body 10, each action bars mechanism 21 ~ 24 also with tubular axle portion 65 for center of rotation is rotated.Therefore, when making upper shelf 60 and the opening and closing rotation of operation plate body 10 about, need not unload each action bars mechanism 21 ~ 24, their existence also has no relations.Therefore, the rotating operation of opening and closing up and down of upper shelf 60 and operation plate body 10 is easy, in this regard, also can improve the maintenance activity efficiency of device class at engine 5 top, this position.

In addition, in side arm 62, to be positioned at front linking arm 70, releasably connects on auxiliary frame 54 with bolt and nut, and this auxiliary frame 54 erects the front of the engine 5 in body frame 2, so, easily can carry out the handling of side arm 62 (upper shelf 60) and auxiliary frame 54.

And, the anterior-posterior length of side arm 62, be set as the size that the leading section of this side arm 62 is given prominence to from the front end of operation plate body 10 forward, under the state that engine cover body 11 has been unloaded, the leading section (part of linking arm 70) of side arm 62 is exposed to the front of operation plate body 10, so operator pinches this exposed portion (part of linking arm 70), carry out the rotating operation of opening and closing up and down of upper shelf 60 and operation plate body 10.That is, the linking arm 70 of side arm 62, has the function as upper and lower opening and closing rotating operation handle concurrently, so, even without special grip member, also easily can carry out the rotating operation of opening and closing up and down of upper shelf 60 and operation plate body 10, contribute to reducing component number.

(6) structure of gear shift pedal and the continuous action relation of gear shift pedal and speed of a motor vehicle adjusting rod.

Below, with reference to accompanying drawing 12 ~ Figure 17, the structure of gear shift pedal and the continuous action relation of gear shift pedal and speed of a motor vehicle adjusting rod are described.

Gear shift pedal 18 has the pedal 130 that operator rides and the pitman arm 131 being connected to pedal 130 back side.Be fixed on the shaft hub 132 of pitman arm 131 bottom, can unitary rotation ground fitted on lateral velocity variation pedal shaft 133, the rotatable earth's axis of this gear shift pedal axle 133 is bearing on body frame 2.

In gear shift pedal axle 133, from the part that the shaft hub 132 of pitman arm 131 stretches out, be installed with switching arm 134.Switching arm 134 extends towards above-below direction across gear shift pedal axle 133 ground.One end of connection rod of gear shifting 135, is pivotally connected in the bottom of this switching arm 134 rotationally by transverse axis pin 136.The other end of connection rod of gear shifting 135, by transverse axis pin 138 be pivotally connected in rotationally be positioned at Hyaulic infinite variable speed machine 170 side (be in embodiments right side), from the side on the shift cam 137 of roughly U-shaped.

A side protruding end portion in shift cam 137, is fixed on gudgeon 139, and this gudgeon 139 forms the adjusting portion of laterally stretching out from a side (being right flank embodiment) of Hyaulic infinite variable speed machine 170.Gudgeon 139 is for the angle of inclination of the swash plate (not shown) of the hydraulic pump in regulator solution pressure type stepless speed changer 170.Gudgeon 139 and shift cam 137, be equivalent to the adjusting portion of Hyaulic infinite variable speed machine 170.

Hyaulic infinite variable speed machine 170 mentioned here, have capacity variable type hydraulic pump (not shown) and capacity fixed hydraulic motor (not shown), by the rotation of gudgeon 139, the angle of inclination of the swash plate (not shown) of regulator solution press pump, by changing discharge direction and the discharge rate of the pressure oil of supply hydraulic motor, the direction of rotation of the output shaft in regulator solution pressure motor and rotating speed.

In embodiments, operator depress gear shift pedal 18 operate time, switching arm 134 rotates centered by gear shift pedal axle 133, by with the switching connection rod of gear shifting 135 that is connected to linkedly of arm 124 and shift cam 137, gudgeon 139 is rotated, like this, the angle of inclination of the swash plate of hydraulic pump is changed adjustment.

At this moment, operator more enters into gear shift pedal 18, switching arm 134 and connection rod of gear shifting 135 more draw shift cam 137 toward rear, more make shift cam 137 and gudgeon 139 towards acceleration direction (clockwise direction in Figure 15 and Figure 16) under rotate upward, as a result, the speed of a motor vehicle of travel machine body 1 is accelerated.

According to the angle of inclination of swash plate and the output of speed change, gear type transmission mechanism (not shown) is delivered to from the output shaft of hydraulic motor, this speed change exports, and the operation by main shift bar 21 is switched to the output of advancing or retreating, and then passes to front and back four-wheel 3,4.In addition, the Hyaulic infinite variable speed machine 170 of embodiment, is contained in outward before gearbox 6.

On the other hand, in the upper end of switching arm 134, laterally project Pivot 140, one end of hydraulic bjuffer 141 and one end of reset extension spring 142, be pivotally connected on this Pivot 140 rotationally.Reset extension spring 142 returns pressure exerting arrangement, and its effect is, when the foot-operated releasing of gear shift pedal 18, gear shift pedal 18 automatically turned back to initial position (speed of a motor vehicle is the position of zero).

Hydraulic bjuffer 141 and reset extension spring 142 are configured to front and back shape in opposite directions.The other end of hydraulic bjuffer 141, is inserted in the pin upward 144 be arranged on body frame 2 by U-shaped metal fittings 143.The other end of reset extension spring 142, to hang over the bracket (not shown) of giving prominence to inwardly from body frame 2 and to fix.

Therefore, when the pin of operator leaves gear shift pedal 18, by the mechanical relationship of the resistance of hydraulic bjuffer 141 and the elastic recovering force of reset extension spring 142, gear shift pedal 18 restores (returning) to initial position with speed slowly, shift cam 137 pushes toward front by switching arm 134 and connection rod of gear shifting 135, shift cam 137 and gudgeon 139 are rotated from the top down towards deceleration direction (counter-clockwise direction in Figure 15 and Figure 16), as a result, the speed of a motor vehicle of travel machine body 1 is set to slow down.

The difference (hereinafter referred to the recuperability of gear shift pedal 18 towards initial position) of the elastic recovering force of reset extension spring 142 and the resistance of hydraulic bjuffer 141, is set as removing the shaft hub 104 of the speed of a motor vehicle adjusting rod 23 that disk spring washer 122 produces and the degree of the frictional retention forces (confining forces of position holding member 120 pairs of speed of a motor vehicle adjusting rods 23) of friction plate 121.

Therefore, enter into operate gear shift pedal 18 state under, when speed of a motor vehicle adjusting rod 23 manually being operated to the operating position corresponding with pedal position (position of entering into), namely, when in-use automotive velocity modulation pole 23 carries out automatic running operation, even if the pin of operator leaves gear shift pedal 18 thereafter, speed of a motor vehicle adjusting rod 23 is also by the confining force holding position by position holding member 120, gear shift pedal 18 can not return movement because of the above-mentioned recuperability towards initial position, and travel machine body 1 carries out constant-speed traveling (automatic running) (see solid line state in Figure 15).

The continuous action relation of gear shift pedal 18 and speed of a motor vehicle adjusting rod 23 is, when carrying out speed change operation (front and back fascinate operation) with speed of a motor vehicle adjusting rod 23, gear shift pedal 18 interlock, towards direction action of entering into; But, when carrying out speed change operation (operation of entering into) with gear shift pedal 18, speed of a motor vehicle adjusting rod 23 not interlock.

In embodiments, the opposing party protruding end portion in shift cam 137, defining is oblong clearance fit hole 145 from the side.The leading section of the speed change steel wire 146 be connected with the L-shaped arm 106 of speed of a motor vehicle adjusting rod 23, via pivot backing pin 147 matched in clearance in this clearance fit hole 145.

The relation of the outside dimension of pivot backing pin 147 and the aperture size of clearance fit hole 145 sets like this: between pivot backing pin 147 and the clearance fit hole 145 of shift cam 137 side, forms fit clearance in the rotation direction of the shift cam 137 centered by gudgeon 139.

Under the state (see state shown in Figure 15 chain lines) that speed of a motor vehicle adjusting rod 23 is positioned at most forward position and gear shift pedal 18 is positioned at initial position, namely, under the state that speed of a motor vehicle adjusting rod 23 and gear shift pedal 18 all inoperation, travel machine body 1 stop, pivot backing pin 147 is positioned at its motion track bottom.Pivot backing pin 147 be positioned at its motion track bottom time, speed change steel wire 146 is that stretching force can play a role the tensile state of degree.

Along with by speed of a motor vehicle adjusting rod 23 from front side in front of operator side (rear side) hypsokinesis operation, shift cam 137 draws by L-shaped arm 106 and speed change steel wire 146 from the bottom up, and shift cam 137 and gudgeon 139 are rotated from the bottom up towards acceleration direction (clockwise direction in Figure 15).Its result, the speed of a motor vehicle of travel machine body 1 is accelerated.At this moment, shift cam 137 pushes connection rod of gear shifting 135 and switching arm 134 toward rear, gear shift pedal 18 is towards direction action of entering into (the solid line state see in Figure 15).

Otherwise, along with operation that speed of a motor vehicle adjusting rod 23 is leaned forward from side (rear side) in front of operator toward front side, L-shaped arm 106 and speed change steel wire 146 are depressed from top to bottom, are made it relax.Like this, with the relax level of speed change steel wire 146 correspondingly, difference (gear shift pedal 18 is towards the recuperability of initial position) the effective leeway of the elastic recovering force of reset extension spring 142 and the resistance of hydraulic bjuffer 141, by this recuperability, gear shift pedal 18 returns and moves to the position corresponding with the operating position of speed of a motor vehicle adjusting rod 23.As a result, the speed of a motor vehicle of travel machine body 1 slows down (see state shown in Figure 15 chain lines).

Therefore, when in-use automotive velocity modulation pole 23 carries out speed change operation (front and back fascinate operation), speed of a motor vehicle adjusting rod 23 and gear shift pedal 18 interlock action (see Figure 15).

On the other hand, under the state that speed of a motor vehicle adjusting rod 23 is positioned at most forward position, operator more enters into gear shift pedal 18 (state see shown in Figure 16 chain lines), shift cam 137 more rotates from the bottom up towards acceleration direction (in Figure 16 clockwise direction), is pushed to by speed change steel wire 146 and makes it relax.In addition, in embodiments, when only entering into operation gear shift pedal 18, although pivot backing pin 147 is mobile in clearance fit hole 145, is not blocked by the edge of clearance fit hole 145, becoming clearance fit state.Therefore, although the speed of a motor vehicle of travel machine body 1 is accelerated, the upwards rotatory force of shift cam 137 does not pass to speed of a motor vehicle adjusting rod 23 by speed change steel wire 146, and speed of a motor vehicle adjusting rod 23 still remains on most forward position (see Figure 16).

In addition, when the pin of operator leaves gear shift pedal 18, the difference (gear shift pedal 18 is towards the recuperability of initial position) of the elastic recovering force of reset extension spring 142 and the resistance of hydraulic bjuffer 141 works, gear shift pedal 18 is returned to initial position with stable speed, shift cam 137 toward front pushing, makes shift cam 137 and gudgeon 139 rotate from top to bottom towards deceleration direction () by switching arm 134 and connection rod of gear shifting 135 in Figure 16 counterclockwise.

At this moment, although stretching force acts on speed change steel wire 146, but, before pin leaves gear shift pedal 18, speed change steel wire 146 is originally lax, speed change steel wire 146 is just turned into stretching force from this relaxed state and plays a role the tensile state of degree, so, although travel machine body 1 is slowed down, but the power that rotates of shift cam 137 does not pass to speed of a motor vehicle adjusting rod 23 by speed change steel wire 146, so, speed of a motor vehicle adjusting rod 23 still remain on most forward position (see Figure 16 solid line shown in state).

Therefore, when carrying out speed change operation (operation of entering into) with gear shift pedal 18, just gear shift pedal 18 is operated separately, and speed of a motor vehicle adjusting rod 23 is interlock (see Figure 16) not.

Under the state of operation gear shift pedal 18 of entering into, when manually speed of a motor vehicle adjusting rod 23 being operated the operating position corresponding with this pedal position (position of entering into), although speed change steel wire 146 is turned into stretching force from relaxed state and plays a role the tensile state of degree, but, when speed of a motor vehicle adjusting rod 23 reaches aforesaid operations position, the pivot backing pin 147 of the front in speed change steel wire 146 is blocked by the clearance fit hole 145 of shift cam 137, speed change steel wire becomes tensioning state, the operation resistance (operation sense) of speed of a motor vehicle adjusting rod 23 increases the weight of (such as, see Figure 15 solid line shown in state).

When this operating position unclamps hand, speed of a motor vehicle adjusting rod 23 keeps its position by the confining force of position holding member 120, gear shift pedal 18 does not return movement because of the above-mentioned recuperability towards initial position, rotation posture and the angle of inclination being arranged on the swash plate on gudgeon 139 of shift cam 137, remain on the state corresponding with the position of gear shift pedal 18 and speed of a motor vehicle adjusting rod 23, travel machine body 1 constant-speed traveling.

In addition, in-use automotive velocity modulation pole 23 if entered into by gear shift pedal 18 under the state not removing the operation of this automatic running, then makes the speed of a motor vehicle of travel machine body 1 accelerate after having carried out automatic running operation with can hold the operating position of speed of a motor vehicle adjusting rod 23.At this moment, if pin leaves gear shift pedal 18, then gear shift pedal 18 again returns and moves to the pedal position corresponding with the operating position of speed of a motor vehicle adjusting rod 23, turn back to original constant-speed traveling state, so, automatic running operation in, if wish that travel machine body 1 is accelerated slightly grade time, automatic running operation can be removed, good operability.

In embodiments, switching arm 134, connection rod of gear shifting 135 and shift cam 137, be equivalent to shaft-like linkage component.This shaft-like linkage component, the adjusting portion export the speed change of regulator solution pressure type stepless speed changer 170 and gear shift pedal 18 couple together.In addition, the reset extension spring 142 of these shaft-like linkage components, speed change steel wire 146, gear shift pedal 18, position holding member 120, be equivalent to the bindiny mechanism that speed of a motor vehicle adjusting rod 23 is associated with gear shift pedal 18.

(7) structure of brake pedal and the continuous action relation of brake pedal and speed of a motor vehicle adjusting rod

Below, with reference to Figure 12 ~ Figure 14 and Figure 17, the structure of gear shift pedal and the continuous action relation of gear shift pedal and speed of a motor vehicle adjusting rod are described.

As shown in Fig. 3 etc., brake pedal 19 and gear shift pedal 18 configure side by side at left and right directions.Although the gear shift pedal axle 133 of the rotating fulcrum of brake pedal 19, i.e. brake pedal shaft 150 and gear shift pedal 18 configures on the same axis, but separately form.The brake pedal shaft 150 of embodiment, can be bearing in above gearbox 6 around its axis rotary axis of earth with laterally extending posture.

The base end part of the pedal arm 151 in brake pedal 19, set firmly arm hub portion 152 (see Figure 14 and Figure 17), this arm hub portion 152 also can rotate with this brake pedal shaft 150 integratedly fitted in an end of brake pedal shaft 150, when operator enters into operation brake pedal 19, brake pedal shaft 150 rotates around its axis together with brake pedal 19.

Although do not illustrate in detail, but when enter into operation brake pedal 19, brake pedal shaft 150 is rotated around its axis time, the main clutch be associatedly located at brake pedal shaft 150 on the output shaft in gearbox 6 disconnects, and interrupts the transmission of power to front and back four-wheel 3,4.In addition, at this moment, the front wheel brake mechanism associated with brake pedal shaft 150, acts on the driving shaft 171 (see Fig. 1) of front-wheel 3, the rotation of this driving shaft 81 and front-wheel 3 is stopped, also travel machine body 1 being braked.

In addition, the arm hub 152 of pedal arm 151 is installed with bracket 153, when the operated by foot of brake pedal 19 is removed, makes an end of the back-moving spring (not shown) of this brake pedal 19 auto-returned initial position, be connected on this bracket 153.The other end of back-moving spring, is connected in the clutch operating plate (not shown) of the side being positioned at gearbox 6.

As shown in Figure 12 ~ Figure 14 and Figure 17, one end of く font connecting rod 156, be pivotally connected on the Pivot 154 of the bottom of through pedal arm 151 rotationally, this く font connecting rod 156 makes to be arranged in Hyaulic infinite variable speed machine 170 side (embodiment is right side), from the side for the constant speed of roughly triangle tabular removes cam 155 and brake pedal 19 interlock.The other end of く font connecting rod 156, is pivotally connected in constant speed rotationally by transverse axis pin 157 and removes on the upper corner 155a of cam 155.

Constant speed removes the rear bight 155b of cam 155, and by horizontal fulcrum 159, pivot suspension is on bracket 158 (see Figure 13) rotationally, and this bracket 158 is fixed on below body frame 2.Therefore, rotate up and down centered by the horizontal fulcrum 159 that constant speed removes 155b side, bight after cam 155.

Be connected to the leading section of the brake bar 160 on the L-shaped arm 106 of speed of a motor vehicle adjusting rod 23, by Pivot 161, be rotatably connected to constant speed and remove on the forward corner 155c of cam 155.

Brake bar 160, constant speed remove cam 155 and く font connecting rod 156, for the automatic running operation that compulsory commutation speed of a motor vehicle adjusting rod 23 performs.

When speed of a motor vehicle adjusting rod 23 performs automatic running operation, when entering into operation brake pedal 19, く font connecting rod 156 is entered into this and operated interlock, constant speed is removed cam 155 pushes toward front, and constant speed is removed cam 155 and rotated from top to bottom around horizontal fulcrum 159 (in Figure 17 clockwise direction).

So, the Pivot 161 of the forward corner 155c side that constant speed is removed in cam 155 moves down, downward stretch-draw brake bar 160, make L-shaped arm 106 and speed of a motor vehicle adjusting rod 23 around the bearing pin portion of U-shaped fulcrum 105 towards deceleration direction (clockwise direction in Figure 17) rotate, make speed of a motor vehicle adjusting rod 23 be returned to most forward position (initial position) (see Figure 17 solid line shown in state).

As shown in Figure 15 chain lines, by the difference (gear shift pedal 18 is towards the recuperability of initial position) of the elastic recovering force of reset extension spring 142 and the resistance of hydraulic bjuffer 141, gear shift pedal 18 turns back to initial position, result, the speed of a motor vehicle of travel machine body 1 is slowed down, meanwhile, automatic running operation is removed.

(8) action effect

For of the prior art, as one of working truck example transplanting rice seedlings machine, be sitting in the operator on operating portion seat, carry out gear shift pedal enter into operation time, Hyaulic infinite variable speed machine is from after the suitable speed change of power of engine, pass to traveling portion, make the speed of a motor vehicle speed change (such as, see Japanese Unexamined Patent Publication 2003-220849 publication etc.) of travel machine body.

When carrying out planting seedlings operation with this transplanting rice seedlings machine, when being sitting in the operator on driver's seat and cannot see or do not see the mark etc. that Chu is drawn on field, the floor that operator will stand on Drive Section drives transplanting rice seedlings machine.

But, in the structure that above-mentioned Japanese Unexamined Patent Publication 2003-220849 publication is recorded, as the operating mechanism of speed of a motor vehicle adjustment operation, gear shift pedal is only had to erect on the ground of operating portion, so, when driving transplanting rice seedlings machine with stance, changing and regulating the operation of the travel machine body speed of a motor vehicle more difficult.

If and adopt the structure of above-mentioned embodiment, then owing to turning to closely being close to of body 15, configure speed of a motor vehicle adjusting rod 23, this speed of a motor vehicle adjusting rod 23 can carry out making the speed change of Hyaulic infinite variable speed machine 170 to export the operation of speed change, operate with such 2 kinds of the operation (the so-called automatic running operation) output of the speed change of Hyaulic infinite variable speed machine 170 being remained the value corresponding with the pedal position of gear shift pedal 18, so, except carrying out except automatic running operation with speed of a motor vehicle adjusting rod 23, not only gear shift pedal 18 can regulate the speed of a motor vehicle of body 1, speed of a motor vehicle adjusting rod 23 also can regulate the speed of a motor vehicle of travel machine body 1, so, the selectance of the operating mechanism that the speed of a motor vehicle regulates is increased.Therefore, can neatly corresponding operation time the various situations while driving (such as operator stand etc.) that occur, operability improves.

But, in this transplanting rice seedlings machine, be all the speed of a motor vehicle carrying out adjustment operation travel machine body 1 with gear shift pedal 18 usually.If the operation of the operation of gear shift pedal 18 and speed of a motor vehicle adjusting rod 23 keeps the relation of interlock always, then, when the operational ton of entering into of gear shift pedal 18 changes, speed of a motor vehicle adjusting rod 23 is automatically action in the offering, very annoying.

About this point, according to the structure of embodiment, speed of a motor vehicle adjusting rod 23 is associated by bindiny mechanism with gear shift pedal 18, and their continuous action relation is: when in-use automotive velocity modulation pole 23 carries out speed change operation, gear shift pedal 18 interlock, and when carrying out speed change operation with gear shift pedal 18, speed of a motor vehicle adjusting rod 23 not interlock, so, when the usual operation of transplanting rice seedlings machine, speed of a motor vehicle adjusting rod 23 not with the action interlock of gear shift pedal 18, can not automatically action.Therefore, whenever gear shift pedal 18 enter into operational ton change time, speed of a motor vehicle adjusting rod 23 can not automatically action before eyes, when operator carries out the speed of a motor vehicle speed change operation of travel machine body 1, not vexatious.

And, gear shift pedal 18 in embodiment and speed of a motor vehicle adjusting rod 23, associated by bindiny mechanism, their action relationships is, when carrying out speed change operation with gear shift pedal 18, when manually speed of a motor vehicle adjusting rod 23 being operated the operating position corresponding with the pedal position of gear shift pedal 18, gear shift pedal 18 is remained on above-mentioned pedal position.So, by the manual operation of speed of a motor vehicle adjusting rod 23, gear shift pedal 18 can be remained on arbitrary pedal position.That is, the maintenance speed of a motor vehicle of the travel machine body 1 regulated in automatic running operation can (stepless) be changed arbitrarily.Therefore, corresponding with job status any speed of a motor vehicle ground driving travel body 1 can be kept, extremely easy concerning operation operator.

In addition, the bindiny mechanism of embodiment, has the shaft-like linkage component, speed change steel wire 146, the reset extension spring 142 of gear shift pedal 18 and the position holding member 120 that are made up of switching arm 134, connection rod of gear shifting 135 and shift cam 137.The leading section of speed change steel wire 146, by pivot backing pin 147 matched in clearance in the clearance fit hole 145 of shift cam 137 forming adjusting portion, so, due to the existence of speed change steel wire 146 of only working in stretch-draw direction, whenever the entering amount change of gear shift pedal 18, can conscientiously prevent the speed of a motor vehicle from regulating 23 automatically actions before eyes.In addition, just in case speed change steel wire 146 is damaged, shaft-like linkage component and reset extension spring 142 also can be utilized to make gear shift pedal 18 turn back to initial position, so safety is high.

In addition, because both speed of a motor vehicle adjusting rod 23 and gear shift pedal 18 see it is all be configured in the same side across the left and right sides turning to body 15 direct of travel of travel machine body 1 (be on the right side of) in embodiment from overlooking, so, the vision being sitting in the operator on driver's seat 17 is good, can improve the operability of these speed of a motor vehicle adjusting rods 23 and gear shift pedal 18.

(9) other

The present invention is not limited to above-mentioned embodiment, can have various form.Such as, the present invention is not limited to transplanting rice seedlings machine, is also applicable to the special operation vehicles such as the agricultural machinery of tractor, combine etc., wheel loader.In addition, the center of rotation of aforesaid operations plate body, i.e. horizontal fulcrum, not limiting is the shape parallel with turning to the sloping shaft of body, also can be and sloping shaft coaxial, also can using sloping shaft itself as horizontal fulcrum.In addition, the speed of a motor vehicle adjusting rods of two kinds of operations can be carried out, be not limited to be located at and turn near body, also can be located at and turn on body itself (such as steering column etc.).

The structure in other each portion is also not limited to illustrated embodiment, can do various change without departing from the scope of the subject in the invention.

Claims (2)

1. a rice transplanter, possesses:

Body frame (2);

Be equipped on the engine (5) of the toe lateral of above-mentioned body frame (2);

Gearbox (6), it is configured at the rear lower portion of above-mentioned engine (5), and has Hyaulic infinite variable speed machine (170) and by the transmission of power of above-mentioned engine (5) to front and back four-wheel (3,4); And

For operating the gear shift pedal mechanism of above-mentioned Hyaulic infinite variable speed machine (170),

This rice transplanter moves along with the operation of above-mentioned gear shift pedal mechanism, and carries out rice transplanting via the seedling-transplanting device (25) of the rear side being configured in above-mentioned body frame (2), it is characterized in that,

Above-mentioned gear shift pedal mechanism comprises gear shift pedal (18), switching arm (134) and connection rod of gear shifting (135),

Described gear shift pedal (18) comprises the pitman arm (131) of the pedal (130) that operator rides and the back side being connected to above-mentioned pedal (130),

The shaft hub (132) being in the bottom of above-mentioned pitman arm (131) can be arranged on horizontal gear shift pedal axle (133) rotationally, this gear shift pedal axle (133) can be bearing on above-mentioned body frame (2) by rotary axis of earth

Above-mentioned gear shift pedal axle (133) is installed with above-mentioned switching arm (134), and above-mentioned switching arm (134) extends towards above-below direction,

One end of above-mentioned connection rod of gear shifting (135) can be pivotally connected on above-mentioned switching arm (134) rotationally, the other end of above-mentioned connection rod of gear shifting (135) can be pivotally connected in rotationally be positioned at above-mentioned Hyaulic infinite variable speed machine (170) side shift cam (137) on

The protruding end portion of the side in above-mentioned shift cam (137) is fixed on gudgeon (139), and this gudgeon (139) forms the adjusting portion of laterally stretching out from a side of above-mentioned Hyaulic infinite variable speed machine (170),

Above-mentioned gudgeon (139) is for regulating the angle of inclination of the swash plate of the hydraulic pump in above-mentioned Hyaulic infinite variable speed machine (170).

2. rice transplanter as claimed in claim 1, is characterized in that,

Rear car axle housing (9) is fixed on the tubular frame (8) rearward highlighted from above-mentioned gearbox (6),

Above-mentioned seedling-transplanting device (25) is positioned at rear compared with above-mentioned rear car axle housing (9), and can save land and be connected to the rearward end of above-mentioned body frame (2) by rising-falling tone via parallel linkage (26),

Across being erected on the turning in the body left and right sides of body (15) of above-mentioned gearbox (6), on the right side of body, configure above-mentioned gear shift pedal (18).